Concrete-form.



H. 0. DAVIDSON.

CONCRETE roam.

APPLICATION F'LED APR-8,1915- 1,Q57,573; Patented Dec.10, I918.

2 sums-sum l- 1; null, nun m. mam unm. wasmm-wu, u e

H. O. DAVIDSON.

CONCRETE FORM.

APPLICATION FILED APR. 8; 1915.

1,287,573. Patented De0.10, 1918.

2 SHEETS-SHEET 2.

4 F I i 5% 19 1&0: J."

a; 53 a W f y 26 o v.2.- W 5 j? f l I 7 1/ I" i T w 9 7 @1 f2 9 z a j 7w j 11 A J 5 4 m: Null-11 "nus co. mnlnurum vuuumcmm n a UNITED STATESrat-ram OFFICE.

HAR'nYo. pevm m orma ise iinieiif'rs, omqrssm r e To TH HY DRAULICPRESSED STEEL COMPANY QOF 'CLEVEJBAN-D, OHIO, A CORPORATION-OF OHIO.

CONCRETEJEORM.

, S-pe'cificati'ou'of Letters Patent.

Patented Dec. 10, 1918.

Application filed'npril s, 1915. Serial m. 20,061.

To all 207mm it maycomem Be it known that I, HARRY O. DAVIDSON, acitizen of the United States, residing at Cleveland Heights, in thecounty or Guyahoga and State of Ohio, have invented a certain new anduseful Improvement in Concrete-Forms, of which the following is a full,clear, and exact-description, reference being had to the accompanyingdrawings.

This invention relates to forms for molding concrete, and moreparticularly to forms that are employed for the purposeof roducingcylindrical objects, such as silos. It is the general purpose of theinvention to produce a form of this kind which can be readily assembledand disassembled and which is readily adjustable wher'eby changes incurvature may be conveniently accomplished. Further and more limitedobjects at the invention will appear hereinafter in connection with thedetailed description. In the drawings forming part hereof, Figure 1represents a view, partly in plan and partly in transverse section, of asilo mold constructed in accordance with my invention; Fig. 2 a detailin perspective of a the interior of the mold; Fig.3 a, verticalsectional viewtthiough the mold; Fig. 4a sectional-detail illustratingthe manner of clamping the innerfmold plates; and Fig. 5 a sectionaldetail illustrating the manner of securing the liners to the uprights.

The form comprises generally a plurality of upright posts or ribs whichform a support for the inner plates of the mold and means associatedwith such uprights for clamping the plates thereto; also a plurality ofplates which may be connected to fo1"m the outer shell of the mold,.both the inner and the outer plates preferably being flexible wherebytheir contour may be changed to produce jcylindrical or segmentalobjects of varyingdiameter; and also horizontal liners which connect theupright posts or ribs. I I v Describing by reference characters thevarious parts illustrated herein, A denotes generally a plurality ofupright posts which support the inner plates of the mold, indicatedgenerally at B. These upright posts A. are connected by means of theliners C, said liners being made each of av pluralityof curved segmentswhich are adapted to telescope-at their ends. D denotes generally theinner portion of the chute for the ensilage, this chute being of tunnelform in section and being provided with a special arch-shaped verticalseries of plates E.

The outer shell comprises a plurality of curved plates F which areprovided with means whereby they may be united to form a segmental orcylindrical wall surrounding the corresponding inner mold wall andhaving a special curved plate G cooperating with the plate E to formtherewith a mold for the ensilage chute. The inner plates maybe shiftedupwardly by hand after each ooiirse of grouting has set, but. the outerseries, being joined together, will be lifted awholeand, forthispurpose, derricks ndicated generally at-H) are carried by the posts"or ribs'A and are provided with theasual blocks and falls for thepurpose of lifting the outer wall.

. 'Thefp'osts, indicated generally at A, are formed of two metallicmembers-one of which is substantially channel-shaped iin se'tition andcomprises a substantially fiat Web l'having divergentsides 2 terminatingin out turned flanges 3, these fiangesbeing united by the second member4 which is connected thereto, These posts are made in suitable lengthswhich lengths may be connectedto form a postof any desired height,

as by "means of the channel splices, Ksee Figs. 2 and 3. 'Thesechani'iel splices are shaped to receive therewithin the abutting endportions of the post members and may v i be connected thereto by meansof bars 5 which ma be identical with the bars shown in Fig. 5, saidbars. having each a body which is conveniently, formed from two metalstraps suitably joined together and each having a bottom flange, asshown at 6, whereby a foot is provided. This foot may be inserted intothe post through the enlarged portion of one of the key hole slots 7with which the posts are provided, the

thereto. Each plate isshown as provided at each lateral edge with ametal plate ex-' tension which is bent to conform to one of the taperedsides of the post A and to seat upon the flange 3 thereof. 8 denotes thepart of this plate extension which 0061)- erates with the inclined sideof the post adj acent thereto and 9 the part which is adapted to engagethe flange 3. 10 denotes the portion of this extension which is securedto the body of the plate B. It will be noted that the parts are soproportioned that, when the portion 9 is in engagement with the flange3, a portion 8 will be substantially in engagement with the side of thepost and the plate B will be in substantial alinement with the plate 1.

To secure the mold plates to the post, I

may employ a yoke 11 the ends whereof are adapted to extend on oppositesides of the post and to engage the parts 9 of the mold plateextensions. .This yoke may be secured in place by means of a bar 12,which may be similar to the bar 5 except that it has two pairs of feet13 and 14; projecting therefrom, the first mentioned pair being adapt-edto engage the inner face of the web 1 when the yoke is in its clampingposition, indicated in Fig. 1, and the second being adapted to engagethe inner face of the web when the yoke is withdrawn and turned at rightangles to the post so that its ends or feet engage said post. The yokeis locked in either of these positions by means of the wedge key 15.This construction of yoke and clamping bar is shown, described andclaimed in the application of Stewart R. McKay No. 872,648 filedNovember 17th, 1914. The plates B, as stated hereinbefore, are of metal,but are sufficiently flexible or resilient to permit them to be bentmore or less without injury, thereby accommodating these plates to silosor similar bodies of varying diameter. A sufficient number of theseplates and posts will be employed to produce a segmental body, leaving aspace for the chute.

I prefer to form the inner wall of the chute mold in the manner shown indetail in Fig. 1. B denotes a pair of short angular plates the endswhereof are connected to the posts which are adjacent to the chuteopening and to a pair of posts A, which are.

identical with the posts A but are located within the chute opening orextension with their backs or webs 1 opposed to each other. Because ofthe absence of liners from the chute portion of the form, the posts Aare braced apart by means of struts 16. B de notes an arch-shaped platethe ends whereof are connected to and supported by the ribs A in thesame manner as the ends of the plates B are connected to and supportedby the posts A. This arch-shaped plate is provided with suitablestrengthening ribs 17 and with inclined braces 18 connected to thearched and end portions of this rib.

Reference has been made to the liners C. A suitable number of theseliners will be employed for the purpose of supporting and properlyalining the posts or ribs A. Each liner consists of a plurality ofsegments, each segment being shown as of channel shape having theflanges 19 presented inwardly or toward the center of the mold while theweb 20 is adapted to engage the posts or ribs A. These liner segmentsmay be recessed, as indicated at 21 Fig. 5, to 0061)- erate with theposts A, and may be secured in place by means of the bolts 5 and wedgekeys 7 which cooperate each with thrust plates 22 of channel shape whichmay be spotwelded to the liner (either to the inside or the outsidethereof) and in line with the recesses 21.

As previously stated, the inner portion of the mold will be shifted,plate by plate, from a lower to a next higher level, after the groutinghas set or hardened sufficiently. It is intended, however, to lift theouter mold section as a whole or unit. This outer section will now bedescribed. It is composed generally of a series of plates F each havingat its lateral edges angle irons 24: whereby adjacent plates may beconnected by means of bolts 25. Each plate will preferably be providedwith a ring 26 which is adapted to receive the hook of a fall. Theplates F are sufiiciently resilient or flexible to en able them to beused in forming the outer sections of molds of varying diameter. If theplates were heavy and rigid, the curva' ture initially given to themcould not be altered and, if the number of plates constituting the outermold section were increased or diminished, a corresponding distortion ofshape in the mold would result. By making these curved plates flexibleor resilient, a greater or less number of plates may be assembled, butthe circular or cylindrical contour can be preserved. because of theresiliency of the plates.

A sufiicient number of plates F will be employed to form the outer shellof the mold, with the exception of the chute portion. This chute portionis provided by a special plate G, the central portion whereof is bentoutwardly into arch form while the lateral edge portions thereof areoutwardly concaved or reversely curved, as shown at 27. The plate G isprovided with the angle irons 24: at its lateral edges whereby it may besecured to the angle irons carried by the lateral edges of the adjacentplates F. Tn order to give the proper shape to the chute portion of theouter mold shell or wall. turnbucklcs 28 are employed, each having oneend connected to the arch portion of the plate G and its other endconnected to a portion of the adjacent plate F. It will be evimemes dentthat, by adjusting; this; tttrnbuckle, the curvature of the portions 27'may be: variedand that thereby it is possible to; produce a chute ofsubstantially the same shape} and appearance silos of widely varyiiigdiameter.

The key-holeslots withwhieh the-posts A are providedform averyconvenient nieansffor sup-perting the brackets which carry theplatforms torthe orkinent, Each bracket is! sholwn: as corn-prising: anapperhorizontal branch 2.9 lihdva lower inclined branch or brace 30-with an interposedxstrut lhebranches 29 and 30 will be. p v'ifded withsuitable lugsyhaving heads which are adapted to enter the. enlargedportionsot a pairof the vertically spaced-keyhole slots and to enablethe brackets te be interlocked with the post by gravity theheadsengaging the narrow bottom portions of the slots as the weight of thebracket, carriesmeansof the same-splice-elza-rizp K that is.-

cnrployed for uniting the other post sections.-

The horizontal arm 34: of the derrick extends across the top of the formand carries. a block 35,- the fall 36 whereof is. shown as:

provided with a hook 37. -Wh en these hooks are inserted into theappropriate rill-@4261, the outer mold section may: be raised as a wholeto the next level. and may be sup ported by the derricks until the nextsue ceeding operation.

Having thus described my inventiomvthat I claimis::

1. In a form of the character described, the combination of a series ofposts, a pair of posts offsetfrom said series and located respectivelyadjacent tothe first and the lastpost of the series, curved platesindependent of the posts extending between and adapted to be secured tothe posts in said series-and forming a segmental wall, plates extendingbetween the first and last postsof the series and the ofi'set posts, anda plate extending between and connected to the ofiset posts;

In a form of the character described, the combination of a series ofposts,- a pair of posts o fiset froni saidserfiesrand locatedrespectively adjacent to the first and the last post of the series,plates independent of the posts extending between and adapted to besecuredto the posts in said series and formiug a; segmental wall, and acurved'plat'eex tending"- between and connected to the pair of ofi sotposts.

= 3. In a form of the character described, the combination of a seriesof posts arranged substantially circular sfdrniatione platesindependent-0t said; postsandinterposed between-allot the postsexcept'the first and the last. postof the series, an outwardly curved plateinterposed between the first and the last: post. of the series, the saidplates. and posts constituting an inner mold wall havingan outwardlyprojecting chute or chambe-rbetweensuch first and lastposts, and anoutenniold wall surrounding the inner wall and having a. curved sectioncorresponding to the outwardly curved plate between the first and thelast. post of the series.

In .a form. of'the character described, the. combination of a series ofposts, a pair of posts ofi 'se't froinsaidseries and locatedrespectivelyadj acent to. the first and the last postof: the series,curved: resilient plates extendingbetween and secured to the posts ofsaid seriesqand forming; a segmental wall, an angular plate having onebranch secured to the first post of 'the series and itsother branchsecured to the adjacent oifset post, a secondangular plate having onebranch seortredto the; lastcpost: of said series and its other branchsecnred'to the other ofiset: post, anda-ccnrvedplate having its endssecured to said ofi'seti 5.111 a form of the. character described, thecombination of a series: of posts, a pair oiiposts; efiset from saidseries and located respectively adjacent to, the first and the last postof the series, plates extending between theposts orsaid series andforrnin a segmental wall, bent plates extending ietween the and thelast; posts of the series: and the offset posts, a plate interposedbetween said offset posts.

(t .Ina-fornr of the character described, the combination of a series ofposts, segmental curved liners. connected tosaid posts, c-umvedresilient plates interposed between said posts an'd a series of curvedresilient plates connected together at their lateral edges andsurrounding and spaced from the said posts and th'e first mentionedseries of plates, s l v 7 a form of the character described, thecombination of a series of posts, curved plates independent oi the postsinterposed between and secured to the posts of said se ries,-= pairofiposts offset from said series and located respectively adjacent tothe first and the last post of the series, plates interposed" betweenthe and the last post of the'series and the ofi'set' posts, a curvedplate interposedi between the offset posts, and bracesor strutsinterposed between said offset posts.

82 In 'a form of the character described, the combination of a series ofposts, resilient curved plates independent of the posts interposedbetween secured to the posts of the series, pair of posts offset fromsaid seriees, and located respectively adjacent to the andthe-lasttpost; of; such series, bentplates interposed between the firstand the last post of the series and the offset posts, an arch shapedplate interposed between and having its ends connected to the ofi'setposts, and braces or struts interposed between said otlset posts.

9. In a mold of the character described, the combination of an innermold member comprising a series of posts and a series of curved platesconnected to said posts and adapted to form a segmental body with alateral chute projection, and an outer mold member comprising a seriesof curved resilient plates having their lateral edges connected andarranged substantially concentric with the inner series and having achute projection spaced from the corresponding projection of the innermold member, and means connected with such chute projection of the outermold member for varying the cont-our thereof.

10. In a mold of the character described, the combination of an innermold member comprising a series of curved resilient plates arranged toform a segmental body with a lateral chute projection, vertical postssupporting the lateral edges of said plates, an outer mold membercomprising a series of curved resilient plates having their lateraledges connected and arranged substantially concentric with the innerseries and having a chute projection spaced from the correspondingprojection of the inner mold member, and means connected with such chuteprojection of the outer mold member for varyin the shape thereof.

11. In a mold of the character described, the combination of a pair ofmold plates, a resilient plate interposed between said plates and havinga portion projecting out of the line of said plates, and adjustablemeans connecting the projecting portion with the first mentioned plateswhereby the contour of such portion may be altered.

12. In a mold of the character described,

the combination of a pair of mold plates, a

resilient plate interposed between said plates and having an archportion projecting out of the line of said plates, and adjustable meansconnected between the arch portion and the plate whereby the contour ofsuch portion may be altered.

13. In a mold of the character described, the combination of a segmentalmold wall, a resilient plate interposed between the ends of said walland forming one of the mold walls for a' chute, and means for varyingthe contour of such chute wall.

14. In a mold of the character described, the combination of a pair ofcurved plates, a resilient plate interposedbetween the first mentionedplates and having its central portion projecting beyond said plates andconnected thereto by a reversely curved portion of such resilientplates, andmeans adjust ably connecting such projecting portion with thefirst mentioned plates whereby the curvature of the projecting portionmay be varied.

15. In a mold of the character described, the combination of an innermember comprising a series of curved plates arranged to form a segmentalbody with an arched extension, an outer mold member comprising aplurality of curved plates adapted to be arranged substantiallyconcentric with the circular portion of the inner member, the outermember having a resilient plate shaped to form an extension spaced fromthe extension of the inner member, and means adjustably connecting thesides of such projecting portion with the curved plates adjacentthereto.

' 16. In a. mold of the character described, the combination of an innermember comprising a series of curved plates arranged to form a circularbody with a chute extension, an outer mold member comprising a pluralityof curved resilient plates adapted to be arranged substantiallyconcentric with the circular portion of the inner member. the outermember having a resilient plate adapted to form a chute extension spacedfrom the chute extension of the inner member, and means adjustablyconnected to the sides of such outer chute extension to vary the contourthereof.

17. In a mold of the character described, the combination of an innermember having a circular portion and an outwardly projecting extensionarranged to form the inner wall of a chute. an outer member having acircular portion adapted to be placed substantially concentric with thecircular portion of the inner member and'having aresilient plate withits central portion projecting outwardly to form the outer wall of achute the lateral portions of said plate being concave, and meansadjustablv connecting the outwardly projecting sides of the lastmentioned plate with the circular portion whereby the concavity of thelateral portions of the intermediate plate may be varied.

18. In a mold of the character described, the combination of a pair ofspaced plates, a resilient plate interposed therebetween and having acentral portion which is out of line with such spaced plates and havingconcaved lateral portions extending between the central projectingportion and such adjacent plates, and means adjustably connected witheach side of the projecting portion of the intermediate plate and one ofthe adjacent plates and extending across the concaved portion of suchintermediate plate.

19. In a mold of the character described, the combination of a pair ofspaced plates. a resilient plate interposed therebetween and raving acentral portion which is out of line with such spaced plates and havingconcaved lateral portions and adjustable means for varying the concavityof such lateral portions of said resilient plate.

20. In a mold of the character described, the combination of a pair ofspaced plates, a resilient plate interposed therebetween and having acentral portion which is out of line with such spaced plates and havingconcaved lateral portions interposed betweenthe central projectingportion and such adjacent plates, and turn buckles connected with eachside of the projecting portion of the intermediate plate and one of theadjacent plates and extending across the concaved portion of suchintermediate plate.

' 21. In a mold of the character described, the combination of a posthaving a lateral flange and a tapered side, a mold plate having alateral extension which is adapted to conform to said tapered side andto said lateral flange, and means carried by the posts for clamping theflange-engaging portion of such extension against said flange.

22. In a mold form of the character described, the combination of ahollow post having tapered sides and laterally projecting flanges, apair of mold plates each having a lateral extension one portion whereofconforms to the tapered face of the post and another portion whereofconforms to and is adapted to. engage the adjacent lateral flange ofsaid post, and clamping means carried by the post and adapted to engagethe flange engaging portions and the lateral extensions of the saidplates.

In testimony whereof, I hereunto aflix my signature in the presence oftwo witnesses.

HARRY O. DAVIDSON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. 0.

